I'm trying to configure my Azure DevOps Server to send emails using my Office 365 account, with no luck. I tried setting the SMTP server as indicated on this page: POP, IMAP, and SMTP settings but it doesn't work and gives me an error if I try to send an email ("Error in processing. The server response was: 5.7.3 STARTTLS is required to send mail").
Is there a way to configure it properly? Or as an alternative, do you know of any SMTP server/proxy that I can install to work around the problem?